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K. E. Herkenhoff, L. A. Weller, J. R. Johnson (USGS Astrogeology Team)
The Imager for Mars Pathfinder (IMP) obtained a full panorama of the Sagan Memorial Station landing site on Sol 2, before the IMP mast was deployed. The images in this panorama were taken in 4 filters (including stereo) and losslessly compressed to provide a high-quality multispectral survey of the landing site even if the IMP mast did not successfully deploy; this data set was therefore called the “Insurance Pan”. Stereo data were acquired in the blue (445 nm) filter, as well as right-eye green (531 nm), orange (600 nm), and near-infrared (752 nm) data. The Insurance Pan complements other IMP data sets by providing high-fidelity (losslessly compressed) image coverage of much of the landing site in 4 filters from a different point of view. The Insurance Pan data can be used for various quantitative studies, including far-field stereogrammetry when paired with images taken after mast deploy. Parts of the Insurance Pan include areas along the photometric equator and are therefore useful in extending previous photometric studies. The potential for these and other types of investigations using the Insurance Pan motivated us to assemble multispectral mosaics.
Previous attempts to analyze the Insurance Pan have been complicated by the differences in camera pointing between the stereo blue images and the other multispectral images. These differences caused rotation as well as translation of the blue images relative to the other images. The USGS Integrated Software for Imagers and Spectrometers system that was used to process other IMP data included programs to correct for random misalignment of filter bands by translating images relative to each other but not rotating them. Therefore, a new program was developed that performs an affine transformation between Cartesian coordinate systems. This work was supported by the NASA Mars Data Analysis Program.
The author(s) of this abstract have provided an email address for comments about the abstract: kherkenhoff@usgs.gov
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Bulletin of the American Astronomical Society, 35 #4
© 2003. The American Astronomical Soceity.